SIGNAL PROCESSING SYSTEM AND METHOD THEREOF
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United States of America Patent
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Sep 20, 2018
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Apr 7, 2017
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Apr 7, 2017
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Abstract
The invention disclosed a signal processing system and method thereof, applicable to temperature compensation processing of resonance frequency (OSC) LC-tank oscillator. The signal processing method of the signal processing system uses a temperature sensor/ADC to obtain different K values related to different temperatures and records K values in OTPROM in temperature compensation processing module; a fractional-N frequency divider divides the higher OSC outputted by LC-tank; a linear PLL (LPLL) suppresses the timing jitter of the clock outputted by the fractional-N frequency divider, the frequency-locked loops (FLL) finds the M and N values required by fractional-N frequency divider according to the processed clock after the LPLL processing timing jitter and an applied external clock frequency, and transmits to temperature compensation processing module; and the temperature compensation processing module transmits the K, M and N values to fractional-N frequency divider so that the fractional-N frequency divider outputs accurate clock.
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